# 绘制弧形
import math
import pygame, sys
from pygame.locals import *

pygame.init()

screen = pygame.display.set_mode((600, 500))
pygame.display.set_caption("Drawing Arcs")

while True:
    for event in pygame.event.get():
        if event in (QUIT, KEYDOWN):
            sys.exit()

    screen.fill((0, 0, 200))

    color = (255, 0, 255)
    position = (200, 150, 200, 200)
    start_angle = math.radians(0)
    end_angle = math.radians(180)
    width = 8
    pygame.draw.arc(screen, color, position, start_angle, end_angle, width)

    pygame.display.update()

